USB HID Keyboard LED emulator in CircuitPython

code.py

import time
import usb_hid
import adafruit_hid

keyboard_hid = adafruit_hid.find_device(usb_hid.devices, usage_page=1, usage=6)

print("waiting for LED commands from computer")
while True:
    out_report = keyboard_hid.get_last_received_report()  # out from computer
    if out_report:
        print(["%02x" % x for x in out_report])
        time.sleep(0.5)
    
    
# Note in Linux you can then toggle the LEDs with:
#  echo "1" | sudo tee -a  /sys/class/leds/input41::scrolllock/brightness
#  echo "0" | sudo tee -a  /sys/class/leds/input41::scrolllock/brightness
# and "input41" will change depending on when and where you plug in your CircuitPython device.